打印机队列监视程序源码，监视文件开始打印及打印进程。-The printer queue monitor the program source code, to monitor the beginning of the file to print and print processes.

打印机队列监控源码,可以遍历所有打印机，监控打印队列-Printer queue monitor source code, you can traverse all the printers, monitor print queue

DesktopApp平台通过winspool接口实现对打印机驱动的监控，并接收印刷Job状态变更事件。(DesktopApp platform to achieve control of the printer driver through the winspool interface, and receive a printed Job state change events.)

Some of the API calls used in this example are only supported on Windows NT, 2000, XP and .NET server. Therefore this technique does not apply to Windows 95, Windows 98 or Windows ME. Although VB.NET printer handling has improved immeasurably over